/* 图片预览 */
.book-cover-preview {
    max-width: 10%;
    height: auto;
}

/* 表单样式 */
form {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-top: 50px;
}

input[type="text"],
input[type="file"],
input[type="submit"] {
    padding: 10px;
    margin-bottom: 20px;
    border-radius: 5px;
    border: none;
    background-color: #f2f2f2;
    font-size: 16px;
    color: #333;
    width: 50%;
    max-width: 500px;
}

input[type="file"] {
    width: 100%;
}

input[type="submit"] {
    background-color: #4CAF50;
    color: white;
    cursor: pointer;
}

a {
    display: block;
    margin-top: 20px;
    text-align: center;
    color: blue;
    text-decoration: none;
    font-size: 16px;
}

a:hover {
    text-decoration: underline;
}

h1 {
    text-align: center;
}

body {
    background-color: #f7f9f9;
    font-family: Arial, Helvetica, sans-serif;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
    box-sizing: border-box;
}